| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10851
|
Sun Jan 4 22:08:46 2015 |
rana | Update | IOO | MC loop characterizations: PZT/EOM crossover | * PMC + MC were unlocked when I came
in.
* I fiddled around some more with |
|
|
10874
|
Wed Jan 7 21:13:35 2015 |
rana | Update | General | inane LSCoffsets script removed |
|
|
|
10899
|
Wed Jan 14 02:11:07 2015 |
rana | Summary | Treasure | 2-loop Algebra Loopology | I show here
the matrix formalism to calculate analytically
the loop TF relationships for the IMC w/ |
|
|
10949
|
Wed Jan 28 14:19:02 2015 |
rana | Update | LSC | Transitioned DARM to AS55Q | Why AS55/(TRX + TRY) instead of just TRX?
Isn't (TRX+TRY) controlled by CARM? |
|
|
10988
|
Sun Feb 8 21:54:50 2015 |
rana | Summary | PSL | ISS AOM driver check | This is good
news. It means that the driver probably won't
limit the response of the loop - I expect |
|
|
10998
|
Wed Feb 11 00:07:54 2015 |
rana | Update | LSC | Lock Loss plot | Here is a lock loss from around 11 PM tonight.
Might be due to poor PRC signals. |
|
|
11002
|
Wed Feb 11 16:49:41 2015 |
rana | Update | elog | ELOGD restarted | No elog
response from outside and no elogd process
|
|
|
11008
|
Thu Feb 12 01:00:18 2015 |
rana | Update | LSC | RFPD spectra | The nonlinearity in the LSC detection chain
(cf T050268)
comes from the |
|
|
11009
|
Thu Feb 12 01:43:09 2015 |
rana | Update | LSC | New Locking Paradigm - LSC model changes | With the |
|
|
11018
|
Thu Feb 12 23:40:12 2015 |
rana | Update | IOO | Bounce / Roll stopband filters added to MC ASC filter banks | |
|
|
11020
|
Fri Feb 13 03:28:34 2015 |
rana | Update | LSC | New Locking Paradigm - Loop-gebra | Not
so fast!
In the drawing,
the FF path should actually be summed in |
|
|
11025
|
Fri Feb 13 18:56:44 2015 |
rana | Update | Electronics | Second QPD Whitening Switch enabled | Depends on the plots of the whitening I
guess; if its low freq sat, then we lower
the light level with ND filters. If its happening |
|
|
11034
|
Sun Feb 15 20:55:48 2015 |
rana | Summary | LSC | [ELOG LIST] 3f modulation cancellation | I wonder if DRMI can be locked on 3f using
this lower 55 MHz modulation depth. It seems
that PRMI should be unaffected, but that |
|
|
11040
|
Mon Feb 16 21:52:51 2015 |
rana | HowTo | Treasure | big Dataviewer windows | Following this
entry, I have made the same change in
the controls account on rossa: |
|
|
11057
|
Mon Feb 23 08:06:59 2015 |
rana | Update | ASC | QPD frontend code unified | Might have to also get the OL screens that
go with this new code to see, but the calibrations
don't go into the matrix, but rather |
|
|
11067
|
Wed Feb 25 14:18:28 2015 |
rana | Update | LSC | Delay line re-installed, measurements round 2 | The Schnupp asymmetry is definitely not
an important parameter (no need for Koji
to explode). It only serves to give us a |
|
|
11071
|
Wed Feb 25 23:48:57 2015 |
rana | Update | LSC | some thoughts |
Comparing just the 2 cases with
locking on 33, it seems that the 55 MHz gain
has changed by 14 dB instead of the 10 dB |
|
|
11081
|
Fri Feb 27 01:59:57 2015 |
rana | HowTo | LSC | iPython Notebook for LSC Sensing Matrix | I
have adapted one of Evan's python scripts |
|
|
11096
|
Wed Mar 4 00:50:36 2015 |
rana | Bureaucracy | Treasure | Transitioned DARM to AS55Q, some other work | Just
in case there was some confusion, the champagne
on my desk is not to be opened |
|
|
11103
|
Thu Mar 5 19:13:17 2015 |
rana | Update | CDS | mxStream all restart at ~7:10 pm | |
|
|
11106
|
Fri Mar 6 00:59:13 2015 |
rana | Summary | IOO | MC alignment not drifting; PSL beam is drifting | In the attached plot you can see that the
MC REFL fluctuations started getting larger
on Feb 24 just after midnight. Its been bad |
|
|
11107
|
Fri Mar 6 02:10:35 2015 |
rana | Update | LSC | Arm length remeasurement | This has been done before:
http://nodus.ligo.caltech.edu:8080/40m/6938
Arm length measurements and g-factor |
|
|
11112
|
Fri Mar 6 19:54:15 2015 |
rana | Summary | IOO | MC alignment not drifting; PSL beam is drifting | MC Refl
alignment follow up: the alignment from last |
|
|
11121
|
Sun Mar 8 13:51:41 2015 |
rana | Update | LSC | Error signal blending for CARM/DARM transitions | According
to the official rules, we only need 8 seconds |
|
|
11140
|
Fri Mar 13 14:11:59 2015 |
rana | Update | LSC | 6+ CARM->REFL transitions, 1 DARM->AS transition | Since the DARM_OUT signal is only 500 counts_peak,
I don't see why AS55 whitening needs
to be switched on. |
|
|
11141
|
Fri Mar 13 23:49:28 2015 |
rana | Update | PSL | Relaxation Osc and the NPRO Noise eater | Another thought about the mystery PCDRIVE
noise: we've been thinking that it could
be some slow death inside the NPRO, but it |
|
|
11142
|
Sat Mar 14 00:12:18 2015 |
rana | Update | SUS | Oplevs huh? | The oplev situation still seems unresolved
- notice this DTT. I guess there are still
inconsistencies in the screens / models etc. |
|
|
11155
|
Sun Mar 22 13:53:44 2015 |
rana | Update | SUS | ITMX alignment jumps | So, was there real shifting in the ITMX
alignment as seen in the DV trend or just
mis-diagnosis from the ETMX violin mode? |
|
|
11161
|
Mon Mar 23 19:30:36 2015 |
rana | Update | Computer Scripts / Programs | rsync frames to LDAS cluster | The rsync job to sync our frames over to
the cluster has been on a 20 MB/s BW limit
for awhile now. |
|
|
11202
|
Sat Apr 4 17:54:03 2015 |
rana | Update | Modern Control | Preliminary PRMI angular Wiener results | This
is a very cool result. I'm surprised |
|
|
11204
|
Mon Apr 6 13:23:40 2015 |
rana | Update | PEM | jackhammering at ETMX | Unfortunately, this kind of trend plot
is not detailed enough to know if something
has gone bad in a quantitative way. But at |
|
|
11228
|
Mon Apr 20 21:26:46 2015 |
rana | Update | Electronics | Low noise pre-amps: returned | +1 to both Evan and Zach for prompt info
and +2 to you for getting more stuff than
you started looking for. -2 karma to |
|
|
11231
|
Tue Apr 21 15:03:27 2015 |
rana | Update | Optical Levers | 1103P noise measurement | It doesn't work with the lens in there,
but it seems pretty close. Please leave it
as is and I'll play with it after 5 today. |
|
|
11232
|
Tue Apr 21 21:46:34 2015 |
rana | Update | Optical Levers | 1103P noise measurement | To test what the inherent angular noise
of the HeNe 1103P laser is, we're testing
it on a table pointing into the BS OL QPD |
|
|
11237
|
Wed Apr 22 17:04:11 2015 |
rana | Update | Electronics | MC REFL PD back from the dead | Just randomly found this old entry from
3 years ago. We should |
|
|
11240
|
Thu Apr 23 21:05:23 2015 |
rana | Update | Computer Scripts / Programs | CDSutils upgrade undone | Q: please update this Wiki
page with the go-back procedure: |
|
|
11244
|
Fri Apr 24 18:13:36 2015 |
rana | Update | General | torque for 1/4-20 | For 1/4-20 bolts made of 18-8 Stainless
Steel, the recommended torque varies
from 65-100 inch-pounds, depending upon the |
|
|
11246
|
Fri Apr 24 23:40:15 2015 |
rana | Update | SUS | PRM and BS oplev laser replaced | Recently, Steve replaced the HeNe which
was sourcing the BS & PRM OL. After replacement, |
|
|
11247
|
Sat Apr 25 00:20:16 2015 |
rana | Update | CDS | megatron python autoMC cron | Upgraded python on megatron. Added lines
to the crontab to run autoMX.py. Edited crontab
to have a PYTHONPATH so that it can run .py |
|
|
11250
|
Sat Apr 25 22:17:49 2015 |
rana | Update | CDS | MXstream restart script working (beta) | Since python from crontab seemed intractable, I replaced autoMX.py |
|
|
11251
|
Sun Apr 26 00:08:56 2015 |
rana | HowTo | elog | Troubles with putting plots in external locations | If it all possible, don't use links
to your home directory. Its not robust. It
would be like if you clicked on your Google |
|
|
11252
|
Sun Apr 26 00:56:21 2015 |
rana | Summary | Computer Scripts / Programs | problems with new restart procedures for elogd and apache | Since the nodus upgrade, Eric/Diego changed
the old csh restart procedures to be more
UNIX standard. The instructions are in the |
|
|
11253
|
Sun Apr 26 01:10:18 2015 |
rana | Update | ASC | unBroken Xass? | Today I tried some things, but basically,
lowering the input gain by 10 made the thing
stable. In the attached screenshotstrip, |
|
|
11261
|
Mon Apr 27 21:42:07 2015 |
rana | Update | VAC | Summary pages | We want to have a VAC page in the summaries,
so Steve |
|
|
11263
|
Wed Apr 29 18:12:42 2015 |
rana | Update | Computer Scripts / Programs | nodus update | Installed libmotif3 and libmotif4 on nodus
so that |
|
|
11266
|
Fri May 1 16:42:42 2015 |
rana | Update | DAQ | PEM Slow channels added to saved frames | Still processing, but I think it should
work fine once we have a day of data. Until
then, here's the summary pages so far, |
|
|
11267
|
Fri May 1 20:33:31 2015 |
rana | Summary | Computer Scripts / Programs | problems with new restart procedures for elogd and apache | Same thing again today. So I renamed the |
|
|
11268
|
Sun May 3 01:04:19 2015 |
rana | Summary | PEM | Seismo signals are bad | https://ldas-jobs.ligo.caltech.edu/~max.isi/summary/day/20150502/pem/seismic/
Looks like some of our seismometers
are oscillating, not mounted well, or something |
|
|
11269
|
Sun May 3 19:40:51 2015 |
rana | Update | ASC | Sunday maintenance: alignment, OL center, seismo, temp sensors | X
arm was far out in yaw, so I reran the ASS
for Y and then X. Ran OK; the offload from |
|
|
11271
|
Mon May 4 12:35:49 2015 |
rana | Update | LSC | drift in Y arm | http://www.ligo.caltech.edu/~misi/summary/day/20150504/
I left the arms locked last night.
Looks like the drift in the Y arm power is |
|